A. Majumder, M. Tanveer, A. Reza, A. Chowdhury, and M. Shahabuddin, “Role of Mitral Annular Systolic Velocity in The Evaluation of Left Atrial Appendage Function in Mitral Stenosis”, Cardiovasc. j., vol. 1, no. 1, pp. 26–33, Aug. 2011.